sitemap.xml, <title>

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1.if I submit sitemap.xml to googe I suspect that <title>..</title> found on submited links by crawler will be used as keywords.
2. if so, what is better to have in title :

Eriophorum angustifolium/Common cottongrass/Ozkolistni munec
or
Eriophorum angustifolium / Common cottongrass / Ozkolistni munec

or it does not matter, or some other form of text in <title> is better ?

if so, what is better to have in title : A title should be a descriptive heading nd it's for the users of the site and not directly for the search engines. Thus, as long as your title to a page is meaningful and the contents of the page matches with the title, search engines will be happy. Check how the title of this forum changes when you navigate through different forums.